Quote Originally Posted by kitedemon View Post
My first comment is tubs don't hold heat well at all I have no idea where that idea came from with out power they cool off very very quickly
Your right the hot spot does. But that piece of flexwatt heats up. Heats the bottom. It raises the ambient temp in the tub. Which holds a lot more than a big screen on the top.

My tubs are like +3-4 degrees compared to my room temp....